CSV Format
Your CSV should have a header row with the following columns. Only name is required.
name,email,phone,address,date_of_birth,nationality,tags,source
Jane Smith,jane@email.com,+1-555-0100,123 Main St,1985-03-15,US,"luxury,honeymoon",referral
Bob Johnson,bob@email.com,+1-555-0200,,1978-11-22,UK,corporate,website
Jane Smith,jane@email.com,+1-555-0100,123 Main St,1985-03-15,US,"luxury,honeymoon",referral
Bob Johnson,bob@email.com,+1-555-0200,,1978-11-22,UK,corporate,website